RE 3.5 - Need more flex?? - JeepForum.com

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post #1 of 55 Old 02-15-2009, 08:54 PM Thread Starter
seabass2020
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RE 3.5 - Need more flex??

I have a short arm Rubicon Express 3.5" Super Flex lift. It comes with lower control arms, and i'm using the factory uppers. I have the RE monotube shocks. I'm wondering if I need my jeep to flex more. It seems like often I will have a wheel come off the ground, when I think it should be able to flex more to allow all 4 to stay planted. When I have it flexed, where a wheel just starts to come off the ground, I've had a couple people jump in with me and the extra weight pushes all 4 down. So, what options do I have for additional flex? My swaybar is disconnected.

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post #2 of 55 Old 02-15-2009, 09:02 PM
Jeff91XJ
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I'm sorry for my ignorance of TJ's, but do they have a REAR sway bar? If so Take it off, or get Disco's.

I removed my Rear Sway bar on my XJ and it helped keep my rear tires planted on the ground!
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post #3 of 55 Old 02-15-2009, 09:23 PM
M2LJ
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Disconnecting the rear sway bar on the TJ will not get you any more flex! Trust me, a long time ago I asked about it and got the straight scoop from Mr Jeep himself (Jerry).

I think it may be your RE SF 3.5" kit, which is the reason most folks buy the 4.5" kit and just get the 3.5" springs with it.

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post #4 of 55 Old 02-15-2009, 09:24 PM
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Quote:
Originally Posted by Jeff91XJ View Post
I'm sorry for my ignorance of TJ's, but do they have a REAR sway bar? If so Take it off, or get Disco's.

I removed my Rear Sway bar on my XJ and it helped keep my rear tires planted on the ground!
XJ's are an entirely different animal. TJ's are very unstable with no rear sway bar. do not remove it.

it sounds like you might want some slightly longer shocks. be sure there are some spring retainers on your Jeep before you do that though. the monotube shocks are great shocks but they might be limiting your down travel.

you also might want to look into getting the upper control arms and pretty much anything else that the 3.5" kit doesnt have but the 4.5" kit does. youll get more out of your suspension.

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post #5 of 55 Old 02-15-2009, 09:36 PM Thread Starter
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I've also heard that disco'ing the rear sway bar is a bad idea. Also, there are a few different things between the 4.5 and 3.5 kits, but I thought it was just the track bars and UCA's. I have an adjustable track bar in the front. I paid extra for the monotube shocks (because I thought the twintube were too stiff), so I'd hate to give them up, but i wonder if they are what's limiting my travel. Are shock extenders a possibility?
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post #6 of 55 Old 02-15-2009, 09:44 PM
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I think whats holding you up is your stock upper control arms. They have a rubber bushing on both ends. RE uppers will have a superflex ball joint on one end and rubber bushing on the other. If your adjustable track bar has bushings on both ends, it will bind up also. Be sure to check brake line and shock length as well.

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post #7 of 55 Old 02-15-2009, 10:31 PM
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Sorry guys. Like I said, I don't know much about TJ's....I always forget they have Coil's in the rear. It worked out great on my XJ. I had no Ill side effects from taking it off either.
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post #8 of 55 Old 02-15-2009, 10:39 PM
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Longer shocks.

2005 Black Rubicon - OME 933/942 - 4" Bilstein 5100 (canister up) - JKS Adj Track Bars Front/Rear - JKS Quicker Discos - 285/75/16

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post #9 of 55 Old 02-15-2009, 10:40 PM
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Originally Posted by Jeff91XJ View Post
Sorry then guys. It worked out great on my XJ. I had no Ill side effects from taking it off either.
leaf suspensions have different handling characteristics than the 5 link that the TJ has. my buddy's XJ doesnt have a rear sway bar and hes fine as well. not a bad suggestion for a dedicated trail rig but for a DD its just not going to work well.

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post #10 of 55 Old 02-16-2009, 06:20 AM
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I am in the same boat. I posted up last night and had no replies. I want to resolve this and get all I can before I measure for a CV. When I bought the OMEs they were designated as Long Travel but I have them open all the way and more spring is probably there. http://www.jeepforum.com/forum/showt...58#post6588458
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post #11 of 55 Old 02-16-2009, 07:06 AM
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i would say the biggest limit is your control arms. start picking up used sets and you will see a big improvement over the stock arms. my rear droop increased by over half a (33") tire when i went to SF arms vs stock...

Next my guess would shocks and brake lines, Im running the RE mono tubes for 3.5" lift but im on 2.5" coils... i get comments on my rear articulation all the time... I still have not acquired front RE LCAs so Im still not flexing as much as i would like up front (and yes i know front are rear LCAs are the same but i didnt know that when i bought and installed them )
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post #12 of 55 Old 02-16-2009, 08:52 AM
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I have this lift kit and am upgrading the upper control arms to adjustables and swapping out my coils for 4.5". I think your upper control arms are limiting your flex in addition to your shocks. The bushings are probably shot too.

Another thing to check is make sure your lower control arm busings are greased up so they move easier. The easier they move the more flex you get.

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Last edited by ET48; 02-16-2009 at 03:29 PM.
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post #13 of 55 Old 02-16-2009, 12:57 PM
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I will look closer next Sunday and isolate the limiting piece. I thought if the shocks were open all the way it had to be them. I know the length of the RE CAs is very close to stock. In my case it is probably for the best anyway.
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post #14 of 55 Old 02-16-2009, 03:08 PM
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It is likely the shocks - they are probably maxed out and won't allow the axle to move any further. As an experiment try removing them and flexing the rig out - if it doesn't go any further then the shocks aren't the issue! If it flexes further than it did with them connected then get longer shocks?

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post #15 of 55 Old 02-16-2009, 04:50 PM Thread Starter
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It definitely is not, or couldn't be the brake lines. I'm pretty sure they would break before limiting any kind of travel. If it is the shocks, are there any kind of shock extensions, or do you just have to get longer shocks? I don't see how UCA's could help with flex. They can help with pinion angle, but flex??
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